Run: 2026-03-09-01KK9Q5B8S8ZT0FVQQMN5XC48T

Run Details

Duration:
23.7s
Cost:
$0.018238
Provider:
OpenAI

Evaluation summary

Score Evaluator
Details Link
100.00% Matches word count (details)

Model input

User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 20 words. Please make sure that each sentence has the same length. Only return the opening itself.

Model response

AI
Rain worried the mansion windows as Inspector Vale arrived, summoned before dawn by a trembling butler clutching a bloodstained candlestick. Inside, the grand foyer smelled of lilies and gunpowder, while the family portraits watched like jurors awaiting a verdict silently. Lady Haversham lay beneath the staircase, pearls scattered across marble steps like frozen tears, her throat cut with precision neatly. Her four guests stood nearby in nightclothes and secrets, each pale face reflecting candlelight differently, as though rehearsing innocence already. A clock chimed six, and nobody flinched except the widow's terrier, who growled softly toward the locked music room door. Vale removed his gloves, studying their eyes before the body, because murder usually announced itself there first, unmistakably to him. Then the butler whispered that the victim had hosted a séance nightly, and tonight one guest had arrived already dead.
created_at"2026-03-09T16:33:53.954Z" 3/9/2026, 4:33:53 PM
model"openai/gpt-5.4-20260305"
app_id182717
external_user(null)
streamedtrue
cancelledfalse
latency22116
moderation_latency(null)
generation_time23564
tokens_prompt46
tokens_completion670
native_tokens_prompt41
native_tokens_completion1209
native_tokens_completion_images0
native_tokens_reasoning1021
native_tokens_cached0
num_media_prompt(null)
num_input_audio_prompt(null)
num_media_completion0
num_search_results(null)
origin"https://ncbench.com/"
is_byokfalse
finish_reason"stop"
native_finish_reason"completed"
usage0.0182375
router(null)
provider_responses
0
endpoint_id"9ff5625c-403f-4d7f-b895-58ac7295062c"
id"resp_0f76cdef9a95b3950169aef6720d1c8190b460b92f126d4085"
is_byokfalse
latency236
model_permaslug"openai/gpt-5.4-20260305"
provider_name"OpenAI"
status200
user_agent"langchainjs-openai/1.0.0 ((node/v24.14.0; linux; x64))"
http_referer(null)
api_type"completions"
id"gen-1773074033-n4Q02vSTcEImaFvV5UGI"
upstream_id"resp_0f76cdef9a95b3950169aef6720d1c8190b460b92f126d4085"
total_cost0.0182375
cache_discount(null)
upstream_inference_cost0
provider_name"OpenAI"

Evaluation details

Result Evaluator Details Meta Data
100.00% Matches word count n/a
neededCleanfalse
sentences7
wordCounts
020
120
220
320
420
520
620